Cross-Modal Discrimination Hashing Retrieval Using Variable Length

Table 2

MAP text retrieval image txt2img.

	WIKI data set				NUS-WIDE data set				MIRFlickr data set
	16	32	64	128	16	32	64	128	16	32	64	128
CCA	0.168	0.159	0.154	0.150	0.371	0.365	0.362	0.360	0.579	0.574	0.572	0.570
SCM	0.226	0.246	0.249	0.253	0.535	0.540	0.542	0.539	0.615	0.624	0.628	0.631
SEPH	0.631	0.658	0.659	0.669	0.683	0.695	0.693	0.708	0.710	0.744	0.727	0.744
GSPH	0.645	0.663	0.671	0.674	0.681	0.697	0.686	0.714	0.726	0.742	0.748	0.764
VHC	0.487	0.748	0.751	0.757	0.686	0.715	0.761	0.776	0.766	0.780	0787	0.791